Export: JPEG XL HDR export is attaching unexpected color profile and metadata

[trevor98712893]

Trying to export images to HDR JPEG XL, but most of them are getting woldy inaccurate color profiles and metadata applied.

LR should export with the "Rec. ITU-R BT.2100 PQ" HDR color space, but these images are getting a color space of "QuickTime 'nclc' Video (9,1,2)". Have never seen this color profile before. Attempting to re-export the images will not resolve the issue.

This seems to occur with ~90% of the batch.

macOS 15.1.1 (24B91) with Lightroom Classic 14.0.1

[Moved from ‘Bugs’ to ‘Discussions’ by moderator, according to forum rules.]

[JohanElzenga · Accepted solution]

I see this too, but I think this is more likely a glitch in the MacOS Finder info.

[johnrellis · Accepted solution]

It's a Finder bug, as Johan surmised. When I use "jxlinfo" to examine such files exported by LR, I see a correct description of the Rec 2020 color space:

$ jxlinfo D300hSLI0100.jxl 
JPEG XL file format container (ISO/IEC 18181-2)
JPEG XL image, 4288x2848, lossy, 16-bit RGB
Color space: RGB, D65, Rec.2100 primaries, 709 transfer function, rendering intent: Perceptual
Uncompressed Exif metadata: 1452 bytes
Uncompressed xml  metadata: 14714 bytes

The "jxlinfo" app comes from libjxl, a widely used reference implementation of JPEG XL. Unfortunately, Exiftool doesn't fully support the JPEG XL format, since its developer objects to ISO's counter-productive policy of charging hundreds of dollars for the privilege of reading their specs.

In general, both Mac Finder and Windows Explorer can't be trusted to display metadata accurately.

[trevor98712893]

Perfect, thanks!